This might be a bit niche, but after using it privately for a couple of
years, i've made a first release of Walk, a Python module that provides
a mechanism for running commands, where commands are not run if Walk
can infer that they would not change any generated files.

* An LD_PRELOAD library or syscall tracing is used to detect what files
  a command reads and/or writes.

* Tested and used on Linux and OpenBSD.

* Also provided is an example Python script walkbuild/ which
  uses Walk to work as a build system for the Flightgear open-source
  flight simulator.

For more information, please see:

* Docs:

* Development:

* Install: pip install walkbuild


- Jules
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